I did some testing a couple of years ago with a MacPro (aluminum box generation) running OS-X Snow Leopard and Win 7 on a separate drive running Boot Camp. The performance results all slanted to the OS-X version of NX. Primarily speed benefits while computing or recomputing patterns, etc. They were in some instances 10x faster. I probably attribute that to OS-X and Unix under the hood running things.
The bad part, it's NX running in X11 and nobody here could get over the 1980/90's Unix menus, etc. It's not a native Mac application at all. If it was written for the Mac, I am sure we would have gone that route as most of us here have Mac's at home, but we ended up on the more familiar GUI with NX on Win7.
There are several good NX on OS-X Youtube videos you can watch and see what it's like.
HTH,
Ryan
--
Ryan Gudorf
CAD/CAM Supervisor
Budde Sheet Metal Works, Inc.
Windows 7 Professional x64 SP1
Solid Edge V20
NX8.5.1.3
TC8.3 in Testing
32 GB RAM, nVIDIA Quadro K4000